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PUMP.

APPLICATION FILED SEPT- 7. 1920.

1,391,324. PatentedSept. 20, 1921.

3 SHEETS-SHEET I.

9" ,IHIII. 7 .IIIIMHWI 0&0 o 0 0 o Henry M.Ke1lth H. M. KEITH.

PUMP.

APPLICATION FILED SEPT- 7, 1920.

3 SHEETS-SHEET 2.

Henry M.KeLth I NV ENTOR ATTORN EY WITNm:

H. M. KEITH.

PUMP.

APPLICATION FILED SEPT. 7, I920- Patented Sept. 20, 1921.

3 SHEETS-SHEET 3.

Henry MQKeLth INVENTOR AITORN EY- WITNBS:

UNITED STATES PATENT orrlcs.

.KENBY I. KEITH, 0! WEST FBANKIOBT, ILLINOIS, ABSIGNOB 'lO romeo!- PANY, 01' WEST FEANKFOBT, ILLINOIS.

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Specification of Letters Patent. Patented Sept, 20, 1921.

Application filed September 7, 1920. Serial No. 408,457.

To all whomit may concern:

Be it known that I, HENRY M. KEITH, a citizen of the United States, residing at West Frankfort, in the county of Franklm and State of Illinois, have invented new and useful Improvements in Pumps, of which the following is a specification.

This invention relates to high pressure rotary pumps wherei one or more rotors are eccentrically mounted upon a drive shaft, and operable within a rotor chamber for increasing the force of water supply.

The chief characteristic of this invention resides in providing each rotor with one or more friction disks for regulating the friction of the pump and to prevent the water from slipping from one cavity of the pump to the other, these disks belng operated by springs and the high water pressure.

In carrying out the invention, I provide a sliding gate equipped with suitable packing, one of these gates being arranged withi each rotor chamber, the packing bearing against the periphery of the rotor to prevent leakage or passage of the water from the high pressur side of the chamber to the vacuum or suction side thereof.

An important object of the invention resides in the provision of means for positively actuatingt these gates upon rotation of the drive sha means being designed to automatically adjust the gates to compensate for wear, thereby holdin the packing forming part of the gate in e ective contact with the rotor.

The natur and advantages of the invention will be better understood when the following detail description is read in connection with the accompanying drawings, the invention residing inthe construction, combination and arrangement of parts as claimed.

I the drawings forming part of this a plication, like numerals of reference in icate similar parts in the several views and wherein Figure 1 is a view in elevation of the pump constructed in accordance with my invention.

Fig. 2 is a top plan view.

Fig. 3 is a vertical longitudinal sectional view.

Fig. 4 is a vertical transverse sectional view.

Fig. 5 is a sectional view taken on the line 55 of Fig. 4.

Referring to the drawings in detail, 10 indicates a two-part casing or housing for the mechanism 0 the pump and which housing isdivided by a artition 11 into se arate chambers 12. T e housing is close at the top by means of a removable cover 13. This cover is provided with spaced openings for the inlet and outlet ports 14 and 15 respectively. Each outlet port 15 is provided with a spring pressed inwardly opening valve 15', these valves being arranged in a row along on side of the pump and materially increasing the power of the lat.- ter. J ournaled in suitable bearings 16 and passed throu h the partition 11 is a hollow drive shaft 1 which may be driven by any suitable means. this shaft is a plurality of rotors 18, there being one rotor for each chamber 12. These rotors are fixed upon the shaft 17 for rotation therewith, a ey for this purpose being indicated at 19. Each rotor is preferably cup-shaped, or in other words has its opposite ends provided with deep annular recesses 20 to accommodate what I term fric-' tional elements. These elements consist of a packing 21 which bears against a flanged washer 22, both the packing and washer being slidably fitted upon the shaft 17. A

colled spring 23 encircles this shaft and is interposed between the rear wall of the recess,19 and th washer 22. These s rings are tensioned to force the packing e ement 21 of each rotor in opposite directions and in contacting engagement with one end of the housing 10 and the adjacent side of the partition 11. These elements are utilized to regulate the friction of the pump and to prevent the water from passing from one cavity of the pump to the other, these elements being actuated by the springs and high water pressure. For this purpose I utilize a branch pipe 24 which communicates with the discharge port 15 or in other words the high pressure side of the pump, to convey water into the hollow shaft 17 This shaft is provided with openings 25 disposed within the recesses 20 of the rotors, to admit water under pressure to actuate the friction elements so that they operate against the walls of the housing and the opposed sides of the partition 11 to regu- 7 between th -pipe and hliglgl pressure side of e 'the pumpca'h. becontro v Arranged-Flor "sliding' movement within 3 each chamber,1f2*is a gate 27 of substantially U-shaped formation in cross section to accommodate packing 28 which is effectively held in contacting engagement with the periphery of the rotor 18 to prevent the leakage or passage of water from the discharge port 15 of the inlet opening or port 14. Interposed between the gate 27 and the acking 28 is a thrust plate 29 with WlllCl one end of an adjusting element 30 is associated. This element 30 passes upwardly through a bore in the gate 27 and through a packing gland 31 in the head of the ump so that it can be conveniently manipulated to adjust the thrust plate 29 which in turn effects an adjustment of the packing 28 to maintain the latter in effectively contact with the rotor for the purpose mentioned. The gates in the respective chambers 12 slide in opposite directions incident to the rotation of the rotors 18. To

provide for a positive operation of the gates I utilize a rocker arm 32 provided with a socket 33 for the reception of a pawl 34 forming part of a Spring pressed plunger 35. carried by the head 13 of the pump. A threaded ad usting element 36 is also associated with the plunger 35 and is utilized to regulate the tension of the spring 37. The opposite ends of the rocker arm 32 are bifurcated to straddle the adjusting elements 30 for the packing 38, while the supported portions 38 of this arm defined by the said bifurcation are recessed, as at 39 to receive the peripheries of the disks 40 which are arran ed at the opposite sides of each adjusting e ement 30 and also received within recesses 41 formed in the gates 27. Manifestly these disks provide a connection between the opposed extremities of the rocker arm 32 and the gates 27 to take up the circular movement of the rocker arm and to minimize friction between the parts which they connect. Obviously as the rotors radiate, the arm 32 is rocked upon its fulcrum and thereby insures positive movement of the gates to maintain the latter in effective contact with the said rotors.

In ractice, water or other fluid is admitte to each chamber 1 2, through the inlet 14 thereof, and as the rotor 18 is rotated with the drive shaft 17, the fluid is forced to travel in the same direction as the rotor and is forcibly discharged through the outlet port 15. Each rotor is provided with a groove 42 to accommodate a packing 43 which is brought into effective engagement with the wall ofthe chamber through the instrumentality of springs 43 when it reaches the lowermost point of the chamber, as clearly illustrated, to prevent back-flow of the water during the operation of the pump. The gate 27 together with itsf packing 28 is arranged between the respective )orts 14 and 15 to prevent the fluid passing romthe discharge port to the inlet port during the operation of the pump, thus allowing the intake side of the pump to form a vacuum, and allow the outside air pressure to assist in forcing the water into the chamber 12. As the gates 27 move downwardly in their respective chambers, beyond the point of communication of the branch pipe 24 with the chamber 12, waterfis admltted to pass through the said branch pipe 24 into the shaft 17 from where it passes through the openings 28 into the recesses 20 of the rotors, by reason of which fact the springs and high ressure of the water control the friction e ements, as will be readily understood.

While it is believed that from the foregoing description the nature and advantages of the invention will be readily apparent, I desire to have it understood that I do not limit myself to what is herein shown and described and that such changes ma be resorted to when desired as fall wit in the sco e of what is claimed.

hat I claim is:

1. A rotary pump including a rotor chamber having an inlet and an outlet port, a shaft rotatable within the chamber, a rotor fixed upon the shaft, a packing interposed between said ports and engaging the periphery of said rotor, friction elements connecting the walls of said chamber, and means whereby said elements are controlled by the high pressure of the fluid passing through the pump.

2. A rotary pump comprising a rotor chamber, a rotatable shaft passed through said chamber, a rotor fixed upon the shaft and having a pocket, packin fitted in said pocket to contact the wall 0 said chamber, said chamber having inlet and outlet ports respectively packing interposed between said ports and arranged to engage the periphery of the rotor friction elements associated with the rotor and arranged to contact the op osed walls of the chamber, means where y said elements are controlled by the high pressure of the fluid passing through t e ump, and a spring pressed valve arranged in said outlet port.

3. A rotary pump comprising a rotor chamber having inlet and outlet ports respectively, a spring pressed valve for said outlet port, a rotatable shaft passed through said chamber, a rotor fixed upon the shaft, a slidable gate arranged within each chamber between said ports, means for sliding said gates, each gate being recessed at one end, and packing fitted in each recess and. arranged to engage the periphery of the rotor.

4. 'A rotary pump comprising a krotdr chamber havmg inlet and outlet ports respectivel ,f'a valve for said outlet port, a hollow s aft passed through said chamber and mounted for rotation, a rotor eccentrically mounted upon the shaft and fixed thereto, friction elements arranged in the recess and disposed to contact the o posed walls of the chamber, said hollow shat communicating with said recesses, and-means for conveying water from said discharge port to the hollow shaft and to said recesses or the purpose specified.

5; A rotary pump comprising a casing, a partition dividing the casing into separate chambers, a rotatable shaft passed through said chambers, rotors eccentrically mounted on said shaft and fixed thereto, each chamber havin inlet and outlet ports respectively, sli lng gates arranged in said chambers between said ports, packing forming parts of said gates and arranged to continuously contact the peri heries of said rotors, means .for positive y moving said gates in o posite directions incident to the rotation 0 said rotors, friction elements associated with each rotor and movable with respect thereto and arranged to engage the opposed walls of the casing on the opposite sides of said partition, and means whereby said elements are controlled by the high pressure of the fluid passing through said In testimony whereof I afiix my signature.

HENRY M. KEITH. 

